Why does my Chevy Malibu say Shift to Park when it's already in park?

Short answer: On the 2016–2019 Malibu, a 'Shift to Park' message while you're already in Park almost always means a worn switch inside the shifter that tells the car it's in Park. The car thinks it isn't parked, so it won't fully shut off and can drain the battery overnight. GM issued a bulletin (19-NA-206) with a replacement switch.

Symptom: The 'Shift to Park' message stays on with the shifter in Park, the car won't turn off or keeps accessory power on, a dead battery the next morning, or code B000A.

What to check first

1. Don't squeeze the shifter button when going into Park. Owners on ChevyMalibuForum say that helps the worn switch register.
2. Ask the dealer about GM bulletin 19-NA-206. It covers this message on 2016–2019 Malibus and lists a replacement switch.
3. If the battery keeps dying, test it. A battery weakened by repeated drains may need replacing too.

Likely causes

1. Worn park position switch in the shifter. The small switch inside the shifter wears and stops telling the car it's in Park.
2. Shifter wiring. The bulletin pairs the switch with a redesigned harness, and one owner said the harness and switch together fixed it.
3. Weak battery after repeated drains. The drain itself can damage the battery.

What it usually costs

On ChevyMalibuForum, owners said out-of-warranty repairs ran from about $150 to $700 depending on whether the dealer replaced only the switch or the whole shifter. A 2016 Malibu owner said the bulletin switch and redesigned harness cost about $300 total and fixed it, while a 2019 owner found that bending the switch arm only helped for a while. Under warranty, one owner's dealer replaced the shifter.

Is it safe to keep driving?

The car still drives, but a car that won't fully shut off can drain the battery and leave you stranded. Always make sure it's actually in Park and the engine is off before walking away. Verify with a mechanic.

DIY or shop?

DIY-friendly for handy owners: several on ChevyMalibuForum bought the switch and harness themselves. Make sure you order the part for your model year. Don't bypass the switch by joining its wires, as one owner suggested, because the car then can't tell whether it's really in Park. Shop if you're not comfortable taking the console apart.

Recalls, bulletins and complaints in plain words

• No safety recall covers the 'Shift to Park' message on the 2016–2019 Malibu. It is handled by a service bulletin, so coverage depends on your warranty.
• GM bulletin 19-NA-206 (Intermittent Shift to Park message while in Park, code B000A): GM tells dealers how to diagnose this and lists a replacement park switch. It covers 2016–2019 Malibus and several other GM models.
• NHTSA complaints: 535 keyword-matched complaints for Chevrolet Malibu 2016–2019 (of 2,480 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-19; keywords: shift to park, shift into park, park message, not in park, in park message).

What owners report

• In ChevyMalibuForum's Shift to Park message thread, owners described the message and dead batteries, and listed the replacement switch part numbers (84955381 for 2016–2018 and 84955379 for 2019 and up) along with bulletins 19-NA-206 and 23-NA-119. Owners reported out-of-warranty prices from about $150 to $700.
• In Shift to park (again), a 2019 Malibu owner said bending the switch arm worked only for a while. A 2016 owner whose earlier harness fix stopped working on a sloped driveway bought the bulletin switch (84955381) and redesigned harness (84733196) for about $300 total and had no more messages. Members warned that the switch part number differs for 2019 and newer cars, and the 2019 owner's wife found that not squeezing the shifter button going into Park avoided the message almost every time.

My take

My advice as a former lot tech: we saw this message on lots of GM cars, and it was usually the shifter switch, not anything serious. Ask about the bulletin first, and if you're out of warranty, price the switch yourself before agreeing to a whole shifter.

Vehicle focus: 2016–2019 Chevrolet Malibu (the same message and bulletin also apply to some 2020–2023 Malibus and other GM models).

Safety / mechanic note

A car that won’t fully shut off can drain the battery and leave you stranded. Verify with a mechanic.